Are there good arguments that the cause of some countries have a consistent-in-calendar-time lead over others are such that we should expect the calendar gap to remain constant even as the amount of useful work that can be done per unit of calendar time increases in both the leading and lagging country?
Are there good arguments that the cause of some countries have a consistent-in-calendar-time lead over others are such that we should expect the calendar gap to remain constant even as the amount of useful work that can be done per unit of calendar time increases in both the leading and lagging country?